Scott "Scotty" Smalls is the main protagonist and narrator of the 1993 coming-of-age comedy film The Sandlot, portrayed as a child by Tom Guiry and as an adult by Arliss Howard (with narration by David Mickey Evans). Set in the summer of 1962, the shy and unathletic Scotty moves to the San Fernando Valley (Los Angeles area) with his mother and stepfather, Bill. Struggling to make friends, he is taken under the wing of neighborhood baseball leader Benny "The Jet" Rodriguez, who teaches him how to play and accept the group. In an attempt to impress his new friends, Scotty unknowingly steals his stepfather's prized baseball signed by Babe Ruth and brings it to the sandlot. When the ball is hit over a backyard fence into the territory of a legendary, fearsome mastiff known as "The Beast," it triggers the core conflict and adventure of the film. As an adult, Scotty grows up to work as a sports radio announcer for the Los Angeles Dodgers. The character is famously on the receiving end of the iconic movie quote delivered by Hamilton "Ham" Porter: "You're killing me, Smalls!"

Benjamin Franklin "Benny the Jet" Rodriguez is a fictional character and the main protagonist in the 1993 coming-of-age cult classic baseball film The Sandlot. The charismatic, universally respected, and exceptionally talented leader of the neighborhood sandlot baseball team. In the summer of 1962, he takes the new kid, Scotty Smalls, under his wing. When Smalls hits a home run with an un-autographed-turned-priceless Babe Ruth baseball belonging to his stepfather, Benny famously risks everything to leap the fence and retrieve the ball from "The Beast". Known as "The Jet" for his incredible speed; famously associated with wearing PF Flyers sneakers. The film's flash-forwards reveal that Benny grows up to play professionally for the Los Angeles Dodgers and eventually becomes a major league manager. The young Benny was played by Mike Vitar, and the older version in the final scene was played by his brother, Pablo Vitar. The character also appears in sequels like The Sandlot 2 and The Sandlot: Heading Home (portrayed by Danny Nucci).

Michael "Squints" Palledorous is a fictional character in the 1993 classic family comedy film The Sandlot, portrayed by actor Chauncey Leopardi. A bespectacled, dramatic, and quick-witted 12-year-old kid in the early 1960s suburban neighborhood group. Squints is famous for dramatically recounting the terrifying folklore surrounding the large neighborhood dog behind the sandlot. He is best remembered for faking a drowning accident at the local public pool just to trick the iconic lifeguard, Wendy Peffercorn, into giving him mouth-to-mouth resuscitation and a kiss. At the end of the film, it is revealed he marries Wendy Peffercorn, has nine children, and grows up to become the owner of Squints' Pharmacy. Leopardi later reprised an adult version of the character in the 2007 direct-to-video sequel The Sandlot: Heading Home.

Hamilton "Ham" Porter is a fictional character and the loud, sarcastic, trash-talking catcher in the 1993 coming-of-age baseball film The Sandlot. He was famously played as a child actor by Patrick Renna. He is a catcher and power hitter for the neighborhood sandlot baseball team. His personality is loud-mouthed, confident, short-tempered, and exceptionally skilled at psychological warfare and verbal insults against opposing teams. He wears a New York Yankees cap, idolizes Babe Ruth, teaches Scotty Smalls how to make s'mores, and later becomes a professional wrestler known as "The Great Hambino" in the film's epilogue. He is known for the iconic movie line, "You're killin' me, Smalls!"

Alan "Yeah-Yeah" McClennan is a fictional character from the 1993 coming-of-age sports comedy film The Sandlot, portrayed as a child by actor Marty York. His role is being smart-mouthed, high-energy shortstop and member of the neighborhood sandlot baseball team in 1962. He is known for constantly chewing gum and beginning or punctuating his sentences by repeating his double-affirmative nickname, "Yeah-Yeah". He participated in the group's chaotic scheme—including the "vacuum plan"—to retrieve a valuable Babe Ruth-signed baseball from the yard of the fearsome neighborhood dog known as "The Beast". Later, he was sent to military school by his parents, he later grew up to become a pioneer and developer of bungee jumping.

Kenny "The Heater" DeNunez is the talented team pitcher in the 1993 coming-of-age film The Sandlot, played by actor Brandon Quintin Adams. He was a pitcher and one of the best players on the sandlot baseball team led by Benny Rodriguez. He's known as "The Heater" for his fast throws. He also wears a hat featuring a logo for the Kansas City Monarchs (or the Heaters). He later grows up to play on other baseball teams and coaches his own son's Little League team, also named The Heaters.

Bertram Grover Weeks is a fictional character in the 1993 coming-of-age sports comedy film The Sandlot, portrayed as a child by actor Grant Gelt. His role is fun-loving second baseman for the sandlot baseball team. His appearance is bespectacled, low-key, and slightly rebellious. He famously introduces the rest of the neighborhood kids to "Big Chief" chewing tobacco, which ultimately leads to a disastrous and hilarious day of getting sick on the rides at the local carnival. According to the film's adult narrator (Scotty Smalls), Bertram later "got really into the '60s" during the counterculture movement, after which he completely disappeared and no one ever heard from him again.

Timmy Timmons is a character from the 1993 nostalgic baseball film The Sandlot, played as a child actor by Victor DiMattia. He plays a member of the 1962 sandlot baseball team, serving as the first baseman and a schemer alongside his younger brother, Tommy "Tommy Repeat" Timmons. He hits a notable double against the Tigers and helps build the group's treehouse. According to the film's narrator/lore, he grows up to become a wealthy architect and contractor who invents the modern mini-mall alongside his brother.

Tommy "Repeat" Timmons is a fictional character from the 1993 coming-of-age film The Sandlot, portrayed by actor Shane Obedzinski. He is the youngest member of Benny Rodriguez's neighborhood sandlot baseball team and the younger brother of Timmy Timmons. His trademark running gag in the film is immediately repeating whatever his older brother Timmy says, word for word. He plays in the right-center outfield. In the movie's epilogue, it is revealed that he and Timmy grow up to become multi-millionaire architects and contractors who invent the mini-mall.

Wendy Peffercorn is a fictional character in the 1993 classic film The Sandlot, portrayed by actress Marley Shelton. She works as the neighborhood pool lifeguard during a 1960s summer. Michael "Squints" Palledorous fakes drowning in the deep end just to get mouth-to-mouth resuscitation from her. When he kisses her on the eighth breath, she pushes him away and bans the boys for life. They later marry and have nine children together.

Mr. Mertle is a fictional character in the 1993 coming-of-age sports comedy film The Sandlot, memorably portrayed by legendary actor James Earl Jones. He is a blind, retired professional baseball player who played in the Negro Leagues and personally knew baseball legend Babe Ruth. He lives in a house behind the sandlot's outfield and is the owner of "The Beast" (an English Mastiff named Hercules) that the neighborhood kids deeply fear. His promising baseball career was cut short when a high fast pitch struck him in the face and blinded him. After Hercules destroys a priceless, autographed Babe Ruth baseball belonging to Scotty Smalls' stepfather, Benny Rodriguez and Smalls confront Mr. Mertle. Instead of being the monster the kids imagined, he turns out to be a kind mentor, trading stories with them and gifting them a replacement baseball signed by the entire 1927 New York Yankees lineup in exchange for weekly visits to talk baseball. James Earl Jones reprised the role in the 2005 direct-to-video sequel The Sandlot 2.